BALA and LAKE VYRNWY, including Llanfair Caereinion, Llanfyllin and Llangynog. (Cassini Revised New Series Historical Map RNC 125. 1902-1903). Matching ORDNANCE SURVEY LANDRANGER No. 125. 1:50,000.

(1903) 2007 1st edition thus. Folding map in green-blue card covers. This map includes Llanfair Caereinion, Dinas Mawddwy, Llanuwcllyn, Bala, Llanfyllin, Llangynog and Corwen.

The Cassini Revised New Series provides a fascinating snapshot of the humangeography of Britain at the turn of the twentieth century. These maps are taken from the Ordnance Survey One-Inch 'Revised New Series' sheets, surveyed between 1902 and 1903. The original series of maps were 1" to the mile, and surveyed on a grid different from that employed today. In this new series, however, the 1" maps have been reprojected onto the OS National Grid so that all the edges match up. This makes the whole country into one single sheet from which positions can be read off in National Grid numbers. This single sheethas been redivided, creating new sheets each corresponding precisely to a current Landranger map. The scale is now larger, at 1:50,000. This new series is uniquely useful for exploring the land and accurately pin-pointing where things are, or used to be. Useful for comparisons with current maps on the kitchen table, too. Much to be recommended.